option('gfx_backend', type : 'combo', choices : ['auto', 'd3d11', 'glcore', 'metal'], value : 'auto',
    description : 'The graphics backend to instruct sokol_gfx to use. ' +
                  'If auto is selected, choose the best backend for the target operating system. ' +
                  'd3d11 on Windows, glcore on Linux, and metal on MacOS.'
)